The last entry in Ford's cavalry trilogy following "Fort Apache" and "She Wore a Yellow Ribbon." A U.S. cavalry unit on the Mexican border conducts an unsuccessful campaign against marauding Indians. The commander of the lonely outpost, Lt. Col. Kirby Yorke (Wayne), plays no favorites when his only son, Jeff (Jarman Jr.), arrives as a new recruit and is soon followed by Yorke's estranged wife, Kathleen (O'Hara). Featuring an excellent Victor Young score and several songs by the Sons of the Pioneers.